A store sells cement mix in 20-, 40-, and 50-pound bags. Last week the store sold 25 bags of cement mix. The store sold a total of 920 pounds of mix. The number of 40-pound bags the store sold was two less than twice the number of 20-pound bags it sold. Find the number of 20-, 40-, and 50-pound bags sold last week. Please I need help anyone please

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.